UI incorrectly displays "By java test cases with parameters" instead of "By java class name" for "Test mode" setting

### Jenkins and plugins versions report

Environment

```text
Jenkins: 2.541.3
OS: Linux - 5.15.0-174-generic
Java: 21.0.9 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
Plugin version: parallel-test-executor:611.va_92b_d1852e52
Job type: Freestyle
```

### What Operating System are you using (both controller, and any agents involved in the problem)?

Debian GNU/Linux 13 (trixie)
Ubuntu 22.04.5 LTS

### Reproduction steps

1. Create or edit a freestyle job
2. Add "Parallel Test Executor" build step
3. Change test mode to "By java class name"
4. Click Save
5. Reopen job configuration

### Expected Results

Test mode should display "By java class name"

### Actual Results

Test mode displays "By java test cases with parameters"

### Anything else?

**Important Note:** The `config.xml` file correctly shows:
``

And the job executes correctly using the `JavaClassName` mode. This appears to be a UI-only bug for this specific option. Other test modes display correctly in the UI.

### Are you interested in contributing a fix?

_No response_